See also:

The concept
The automatic engine start-stop function helps save fuel. The system switches off the engine during a stop, e. g., in a traffic congestion or at traffic lights. The ignition remains switched on. ...

Remove unnecessary cargo
Additional weight increases fuel consumption. ...

Fuel cap
Opening 1. Briefly press the rear edge of the fuel filler flap. 2. Turn the fuel cap counterclockwise. 3. Place the fuel cap in the bracket attached to the fuel filler flap. Closing 1. ...